Not sure where best to post this, so I'll put it here.
The MB 45 error reported and fixed recently was caused by missing entries in a _con.csv file. I've added a new check in the site update script to make sure every route is listed in some connected route's "root" list, and adds less than a second to the site update time. Amazingly, only two such errors were found from among over 31,000 routes in TM!
The following should be addressed, I expect by adding a couple entries to chng_con.csv.
Check FAILED: 31457 routes != 31455 connected route roots.
ERROR: route chnnx.g22 not matched by any connected route root.
ERROR: route chngz.g76 not matched by any connected route root.
I'm not sure if I'll just leave this as an error message in the site update log (which likely means I'd have to notice, but means no further code development to do it) or get these into the datacheck page (more code development).